HDD results in images juddery capture

Hi guys,.

Wonder if you could help with a problem, I've been working recently on a spread outside. We were using the AJA IO XT box

Io, XT-Io - products - AJA Video Systems to connect a workstation HP ZBook for a broadcast truck outside via Thunderbolt to capture and play on HD images at an Exchange virtual server. The laptop has a 250 GB and a 1 TB HARD disk SSD 16 GB of RAM, a graphics Quadro K3100, i7 processors and appropriate the AJA drivers and Thunderbolt have been downloaded. The OB truck connected to the IO XT case via SDI cables.

Play out sequences to EVS trucks was fine and capture of internal SSD was fine, but when I captured on the internal HARD disk drive (Toshiba drive of 7 200 RPM), the images were juddery/stuttery times through the window of capture and when read on the timeline.

My first thoughts were that the HARD drive could not write information the disk fast enough where as could, however, the SSD HARD disk drives are used everywhere for video capture so I guess there are something else.

I also assume that the area of IO XT has an internal video card I don't need a card dedicated to the laptop.

Any who can shed light as to why we had this problems and how to solve?


Thanks in advance.


Simon P

Hello

Thanks for your replies. I think that I have pin did the question to be the write speed of the HARD drive, (which is a Toshiba CT 1 full one third). Care online say it can write to about 67 MB/s and I think the codec of the EVS OB was DNX120. At the very least, I know it is 1080i, which will require more than 100 MB/s according to AJA DataCalc. So why the DSS could manage the HARD disk, but it not. At least I know that it wasn't a problem of software or connection.

I think the way forward is a GRaid 0 or 5 who will give me the speeds that I need.

Unforunately it is a last minute work and so I was not prepared to meet the requirements on my laptop and my limited knowledge.

Thanks again for your quick responses.

Tags: Premiere

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